Untersuchung mit 12 Junioren-Wasserballspielern des Nachwuchsleistungssportbereiches des Australian Institute of Sport. Die Probanden absolvierten vier Belastungsperioden (jeweils bestehend aus acht wasserballspezifischen Übungen a 20 Sekunden), an die sich Tests zur Entscheidungsfindung und zu sporttechnischen Fertigkeiten (Torwurf) anschlossen. Aufgezeichnet wurden auch Herzschlagfrequenz und die subjektiv empfundene Belastung sowie Werte für die Blutlaktatkonzentration (diese reichten von 2.1 mmol/l beim ersten bis hin zu 13.1 mmol/l beim letzten Test). This study investigated the effect of fatigue on decision-making and technical skill proficiency in water polo. Twelve junior elite male players (aged 17.2yrs ± 0.5; body weight 84.16kg ± 7.68) at the Australian Institute of Sport were randomly assigned to either a decision-making (DM) or technical skill (TS) proficiency test condition, with the alternative test condition completed on the same day and time in the following week. Each testing session required participants to complete four sets of an incrementally fatiguing intervention, which utilised progressively declining rest ratios, designed to reflect the demands of a water polo game. Each of the four work sets consisted of eight repetitions of a ~ 20 s water polo specific drill conducted at maximum effort inside a 5 x 5m square. Between each set a video-based temporally occluded DM task (verbalised response to various tactical situations) or TS proficiency test (qualitative and quantitative analysis of goal shooting) was performed. Heart rate (HR), rate of perceived exertion (RPE), and blood lactate (BLa) concentration were recorded after each set. HR and RPE were found to increase as the demands of the four exercise sets increased. Peak blood lactate concentrations ranged from 2.1 mmol.1-1 at rest to 13.1 mmol.1-1 following the final work bout. Results also revealed that incremental increases in fatigue differentially influenced decision-making, technical skill performance, and accuracy and power of a goal-shot.
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